Safety device for gas-combustion apparatus



. 1 I 616,495 Feb. 3 3192'?o L HLL a SAFETY DEVICE FOR GAS COMBUSTION AFP ARfiTUS Filed Nov. 14, 1923 INVENTOR Lou/5 HIM,-

1W5 ATTORNEY,

-nary gasburners.

equipped with two separate valves for con i 01y of gas to the burner.

I tion, and in which like reference'characters.

T Figure 2isa side elevation .of

80 spon ing to a portion of Figure 1, but show- I n *ing the apparatus asin su'ch condition-that 1 d co'o'e'.

Q grasped by hand, and use Patented: Feb. 8,1927, I

7 Louis HILLp-OF axnon, onto. 5

starn'ry DEVICE-FOR eAs-conrnnsrrori APPARATUS.

I Application ma irdvei br 14, .1923. Serial. no. 674,628.

, My invention relates to safet I devices for as'combustion apparatus, an more especially to safety devices of simple construction I and small size, u sed in connectionwith ordi- More particularly statedseek to use a gas burner of ordinary .construction,.

' trolling the supply of gas to; the-burner f .10 oneof'these valvesbeing operated byhan and theother being' 'operated by avery sim le thermostatic apparatus and partsim me iately associated-therewithfin such manner that when the temperature ofthe burner; is 3 lowered sufficiently, said last mentioned valve'is actuated so as to cut ofithel sup- -"Reference is madetq the'a'c bin 'iai ying 1 drawing forming apart of tlllSSPGClfiGfiindicate like parts throughoutv the several fig ireS. 1

Figure 1 is a plan view 50f a stove .-burner equipped with my'device the'ya'r'h' ous parts being in 'such condition that the new of gas to the-burner is-eut ottt' v the'j mech-Q f anismshown in Figure -1, f

" Fi re 3 -is a fragmentary plan, .corregas is-flowing freely to the burner.

v R v A. tove burnerappears at 4, and is con--. nected with a. mixing tube 5. Leading intqthe mixing .;--this jet pipe s provided with two "plug, .Q valvesf 7,8. p I

i -y-The valve 7 has a'handle 9 whereby it tube is ajet pipe-6, and

' isoper-ated. The valve -8 has .a' lever '10 "--w he'reby. it is operated, this leverbeing'provid'ed" with an upturned ortion 11 to be;

d for rockingthe lever in order to set-it, as hereinafter de-' i Is'cribed, for "enabling'the lever to be released -'-4 5 by'action of theithermbstatic mechanismlf A tensile'spring 12 is, connected with the" tripping lever ,10 and with a supply pipe 13, with which the jet pipe 5ii s connected,- 1 and-through which gas issupplied to the 5f ,jetpipe; The spring 12 is alwaysunder tension, and its tendency is; torock'the lever 'l0. in atclock wise direction aecording ito Fi ures 1 and 3, andfthi' s to maintain va-gve. 8 in such condition that no gas can scribed, 5 the gas is posed .ad 'ace'nttthe valve 8-is a guide 14;, and slida ly' extending through this guideand supported hereby is a locking bolt 15. This bolt/is provided at one of its ends eye is a pivdtpin. 1-7 This pivot pin 1s with an eye 16, and extending through this carriedby a thermostatic bar .18, and is rigid g relatively thereto; i

The thermostatic bar has a "general-j alienate-form,- as indicated-in Figure 1 It :ismountdjupon a boss 19 of angular form,

as indicatedin Figure 1, so as to be unable. to-r'ock or to have any lost motion relativexE'The thermostatic bar is thus rigid rela-' tively to its mounting uponthe boss, :bu't

Q The thermostatic is heated by the burner, and when thusv heated assumes and :has"a limited swa'yingmovement, as indi cated by full and dotted. lines in Figure ,1, due to the expansion and contraction of. ',thebar. q

maintains the position indicated for the: bar

bydottedlines in Figure 1. When, however, he thermostatic bar is nolonger heated by the j burner, it assumes the positionindicated for -it by full' lines in Figure 1.

{Thus sliding bolt 15 is {thrust to-the 'left according :toFigure '1 whenever the burner 15 heated, and to the right according to thisfigure whenever the burner is J The lockingbol't lti is disposed adjacent thepath of travel of one end of thellever -l0,,"s'o. that when this'lever. is rocked in a counter ,clockwisejdirection according to ,Figure 1- and thus brought into 'thepositionin'di'catedfor it, by dottedlines in this figure, it may beheld" imthis position'by I the locking bolt' 15', provided'this bolt is thrust endwise to the left according to this figure. This 'leaves'thevalve 8 and-"the [various movable parts immediately assoc;

ated therewith in the positionsindicated for them rn Figure 3,'

[With .the parts in the teams just tie;

control by-the manually operated valve 7.

Assuming" the parts to be'in the positions here contemplated, and as indicat din Fi flowing freely through the"val've 8,'but i's nevertheless subject to ure -3,.theoperator'maygrasp t e hand e i i 9, and by. turning. it'into different positions may-control with any degree of 'icety the amount. ofgas fiowin'ginto the- 'uriner, I

Suppose," now, that the two valves not various movable parts associated therewith are in the positions contemplated by Figure 3, and that a sudden gust of wind ex tiuguishes the flame of the gas burner. The result is that the thermostatic bar 18 now ifltiiiit ly cools off, and in-so "doing actuates the locking bolt 15, so that tl'ieth'ermostatic bar and the locking bolt movefromthe positions indicated for them by dotted lines in Figure l to the positlons indicated for them by full lines in this figure. lhe locking-bolt 15 is thus drawn out ofengagementwith the lever 10, and the latter is by tension of the spring 12 rocked in a clockwise direction accordin to Figure 1, from the position indicatedby dotted lines to the position indicated for it byfull lines, in, this figure. Hence the flow of gas through the-jet pipe 6 is by action of the valve 8 cutoff abruptly,,the action 01": the valve being practically automatic.

As may be readily seen, therefore, whenever the device is properly arranged and the gas burner is in action, if the burner flame is extinguished by a sudden gust of wind of by any ordinary means in the nature of an accident, the flow of gas to the burner is cut off, abruptly and automatically.

The operation of my device may be readilyunderstood from the foregoing description.

In order to use the burner, the operator proceeds as follows: By turning the handle '9 into the position indicated for it in Figur.e 1,'the valve 7 is opened. The operator ,now grasps the lever 10, preferably using theportion 11 thereof as a handle, androcks this lever into the position indicated for it by dotted lines in Figure 1 Gas now [lows freely to the burner. The operator next lights'the gas flowing from the burner, and

meanwhile holds the lever 10 in the position indicated for it by dotted lines in Figure 1. The heat from the burner afiects the thermostatio bar 18 as above described, and by so doing causes the locking bolt 15 to be thrust partially in the path of thelever 10. The operator now releases this lever, which thereupon resses sidewise'upon the locking bolt 15 an is by this bolt prevented from turning.

The apparatus remainsin this condition for any length of time,- or in other; words, so long as the burner remains in action. As soon, however, as the burner flame is extinguished by a gust of wind or the like, the lever 10 is released 'as above described, and the valve 8 instantly stops the flow of gas to the burner.

Whenever the flow of gas is thus cut off the operator may as aprecaution grasp the handle 9, and by turningit place the valve 7 in such condition-that this valve alone would be sufiicient' to prevent the passage. of gas to the burner.

practically the same manner as it the valve 1 8 andthe thermostatic mechanism were done awaywith altogether; and the valve 8, under thermostatic control will cut ofi' the supply or gas flowing to the burner, notwithstanding anything the operator may do,

accidentally or otherwise, to the manually operated burner.

l do .not limit myself to the particular mechanism illustrated and described, as variations may be made therein without departing from my invention the scope of which is commensurate with my claims.

I elznmij 1. A device oi the 'characterwdescribed comprising a gasburner, a mixing tube connected-therewith, a jet [pipe extending into said mixing tube for supplying gas through sald mixing. tube to said burner, a'valve mounted upon said jet pipe for opening and closing the same, a lever mounted upon said valve and movableinto two normal tions, one for closing said valve .an the other for keeping said. valve Opemaspring mechanism connected with said lever and osialways under tension for the purpose of closing said valve, a bolt slidably mounted upon said mixing tube, and provided with a portion extending partially into the path of travel ofsaid lever, for the purposezof locking said lever in position to allowgas to flo'w freely through said valve, said :bolt being for this purpose movable-in thegen oral direction of its own length and being" the sole means required for lockin lever, and a thermostatic bar connecte said bolt for the purpose of actuating said bolt, said thermostatic bar havin arcuate form and being curve around said gas burner said thermostatic bar being controllable by temperature of said burner-for the purposeof actuating saidbolt.. v

2. A device of the character described comprising aburner, a mixing tube leading to-said bhrner, a jet pi e for supplyinggas .to said mimng tube an thus to said burner,

n-valve. mounted upon said jetpipe-for' gopening and closing the same, a lELVQT ORI- ried by said valve and movable into two. normal positions, one for closingsaid valve and the then for keeping said valve open, a spring carried by said lever-and always under tension'for the purpose of closing said valve, 8. guide mounted upon said mixing tube, aguide andgslidable relatively thereto, said .bolt being "movable partially into the path bolbextending through said a general I partiallygas to flow, said bolt being the sole means required for locking said lever, and beingof travel of St lid lever for the purpose of looking said lever in the position to allow for this purpose movable in the direction of its own length, and a thermostatiobar connected with said bolt for the purpose of thrusting said bolt lengthwise,'said thermostatie bar having a. general arcuate form" and being curved pertially a'round saidgas burner, said thermostatic bai' being mounted rigidly uponv said burner at the end; of said thermostatic bar opposite the end thereof connected with said bolt, said thermostatic bar being'eontrollable'by temperature of said burner for the purpose of actuating said bolt. I

Signed at Akron, in the countyof Summit and State of Ohio, this 10th day of No vembep, I 1923.

LOUIS HILL. 1 

